How many years did the periodic table of elements took to be fully developed?

Question

For Science report on MONDAY!!!!

AHHHHH need HeLp!!!!!

Answer 1

It dates back to the 1800's but the thing is it's not finished. It's quite an interesting story really.

Answer 2

I agree that the "full development" of the periodic table is still going on.  So count the years from 1869 till 2008.

Not only are new elements being discovered from time to time, but people keep reinventing the periodic table, by coming up with new ways to represent the arrangement of elements.

If you can find this book by Eric Scerri this weekend it will be an excellent reference.

http://chemistry.suite101.com/article.cf...

Yet another article on the recent evolution of the periodic table.

http://www.slate.com/id/2122919

Check out this collection of the periodic tables

http://www.mpcfaculty.net/ron_rinehart/p...

An actual table of the periodic table

http://www.theodoregray.com/PeriodicTabl...

The best survey of various versions of the periodic table from then to now.

http://www.meta-synthesis.com/webbook/35...

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Answer 3

A lot! Meaning, it is still not finished. New elements are still being discovered from time to time. Check the link below for more info.